Giving the code away and charging for something adjacent. Unusually well documented, largely by participants.
Essays on open-source software and its model of collaborative development.
Recommended by: Paul Graham, Ryan Holiday
How Linux came to be developed, and how its creator thinks.
Political economy of production without conventional property.
How open-source software is really made and maintained, often by a few people.
Recommended by: Balaji S. Srinivasan, Delian Asparouhov
Richard Stallman, the free software movement and the GPL licence he wrote.
How to run an open source project, its community and its sponsors.
Paul Grahamrecommends 1 book here
Ryan Holidayrecommends 1 book here
Balaji S. Srinivasanrecommends 1 book here